Connecting Device of Large-Diameter Compressed Air Conveying Pipe

ABSTRACT

A connecting device of large-diameter compressed air conveying pipe is composed by metal outer hull and sealing device. The annular mounting slot is set within the lumen of metal outer hull with the annular slope on the both sides; the sealing device is composed by the annular frame body, two junk rings and two “O” sealing rings. Two junk rings are set on both sides of the annular frame body. The annular slope is respectively set in the shoulder part of junk ring. “O” sealing rings are respectively set at the corner of inner junk ring. Two ends of annular frame body are respectively connected with “O” sealing ring; Moreover, the annular curve or annular slope is set at the corner of the inner junk ring, or the third annular slope is set at two inner tops of the junk ring.

TECHNICAL FIELD OF THE INVENTION

The invention concerns the conveying piping system for compressed air, especially the connecting device of a kind of large-diameter compressed air conveying pipe.

BACKGROUND OF THE INVENTION

A variety of pipe joints are used to connect the compressed air pipe right now. There is a common problem for the existing pipe joints that after connecting, the connection between the pipe and joint is not firm, and may appear the axial displacement . Therefore, the applicant has applied a kind of compressed air quick pipe joint (Application No.: 200810063105.6, application date: 2008 Jul. 10). The pipe joint includes the joint tube and end cover, and they are connected through removable thread. The snap ring holder is set at the end of the joint tube; the inner end of snap ring holder extends to the inside of joint tube, the sealing ring is set when connected with the snap ring holder. The inner ring of the sealing ring protrudes the inner diameter setting of snap ring holder; the outer end face of snap ring holder sets the metal circlip, including the ring body and tine. The tine turns up towards the direction of snap ring holder, and sets the inclined circle at the opening of snap ring holder. The tine is set in the inclined circle. The promotion component is set at the outer end of circlip, and the two ends are connected with the circlip and boss . When using, tighten the end cover, the boss will push the promotion component, which can push the circlip to strut the tine, and the tine can bite the tube to prevent the prolapse. The patent pipe joint is featured with simple structure, convenient implementation and reliable connection.

However, if concern the large compressed air piping system, it needs the large-diameter and small-diameter conveying pipe. The above patent pipe joint is applicable to the connection of small pipeline. When applying the large-diameter pipeline, for the dead load, the above patent pipe joint can not satisfy the requirement on the connection strength.

SUMMARY OF THE INVENTION

In order to solve the technology defect that the present pipe joint can not satisfy the large-diameter pipeline, the invention aims to provide the connection device for a king of large-diameter compressed air conveying pipe. The device can be applied to the large-diameter pipeline connection with the feature of simple structure, convenient implementation and reliable connect.

In order to achieve the above aim, the invention adopts the following technology solution.

The connection device for large-diameter compressed air conveying pipe is composed by metal outer hull and sealing device. The metal outer hull is composed by the first half ring body and the second half ring body. The locking component is set between to connect the first half ring body and the second half ring body; the annular mounting slot is set in the lumen of metal outer hull. The first annular slope is respectively set at the two sides of the annular mounting slot. The first annular slope shows the round towards the two ends. The annular mounting slot is connected with the lumen of metal outer hull through the first annular slope; the sealing device is composed by the annular frame body, two junk rings and two “O” sealing rings. Two junk rings are set on both sides of the annular frame body. The normal section of the junk ring shows “U” shape. The mounting hole is set at the middle of the junk ring. The second annular slope is respectively set at the shoulder part. Two “O” sealing rings are respectively set at the corner of inner junk rings. Two ends of annular frame body are respectively connected with “O” sealing rings; Moreover, the annular curve or annular slope is set at the corner of the inner junk ring, or the third annular slope is set at two inner tops of the junk ring. After locking the first half ring body and the second half ring body, the sealing device is set within the annular mounting slot and the first annular slope. The second annular slope is connected with the first annular slope, the inner diameter of “O” sealing ring is smaller than that of the mounting hole.

As the optimization, two positioning cards are set continuously or internally within the lumen of metal outer hull outside the first annular slope, and the limit slot can be formed among two positioning cards for the bulge loop on clamping conveying pipe. The limit slot can make the axial position for the conveying pipe with bulge loop.

As the optimization, the annular curve or annular slope is set at the corner of inner ring of junk ring. The third annular slope is respectively set at the two ends of the annular frame body.

As the improved technology solution, the locking plate is set at the connection part between the first half ring body and second half ring body. The locking component is bolt, which shall be set at the locking plate to lock the first half ring body and the second half ring body.

As the improved technology solution, the mounting opening is set at the locking plate of the first half ring body. The thread opening is set at the locking plate of the second half ring body. The bolt is set in the mounting opening to connect with the thread opening.

As the improved technology solution, the elastic fitting is set at the locking plate at the connection part between the first half ring body and one side of the second half ring body to connect the first half ring body and the second half ring body. The elastic fitting can be used to connect the first half ring body and the second half ring body on the one side, on the other side, it can primarily locate the first half ring body and the second half ring body, which is easy to mount.

As the optimization, the above elastic fitting is the rubber strip in the locking plate. The boss is respectively set at the two ends of the rubber strip.

As the improved technology solution, the annular limit slot is set at the middle of the outer annular frame body, multiple axially extended components are respectively set at the annular limit slot towards two junk rings, the grab is respectively set at the extended component, and the grab shall be in the annular limit slot. The extended component can make two junk rings in the annular frame body and prevent the scattering of each part in the sealing device.

As the improved technology solution, many axially limit strips are set at the periphery of the annular limit slot. The limit strips can separate many limit notches in the annular limit slot. The limit notch can limit the circumferential rotation of the junk ring.

As the improved technology solution, the extended component in two junk rings shall be malposition set in the limit notch, and the grab shall be within the limit notch.

As the optimization, there are 3 extended components in the circumference of the junk ring.

As the optimization, the annular lug is respectively set at the two ends of metal outer hull, and it forms the support opening of conveying pipe. For the large-diameter compressed air conveying pipe has a larger dead load, therefore, it is better to set the support opening at the two ends of metal outer hull to support the conveying pipe.

Before locking the first half ring body and the second half ring body, the inner diameter of “O” sealing ring within the sealing device in the invention is larger than that of the mounting hole, thus the compressed air conveying pipe can conveniently insert the sealing device. Then make the first half ring body and the second half ring body in the sealing device, and lock them with the locking component. The stress of the first annular slope on the second annular slope can promote the two junk rings to move towards the annular frame body. For the effect of annular curve, annular slope or the third annular slope, “O” sealing ring bulges inward, thus closely connecting the “O” sealing ring and the extine of the compressed air conveying pipe and realizing the sealing connection and position of the pipe. The invention adopts the above technology solution, which can be applied to the large-diameter pipe connection with the feature of simple structure, convenient implementation and reliable connection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the external structure diagram of the invention.

FIG. 2 is the right side view of FIG. 1.

FIG. 3 is the A-A cross-sectional view of FIG. 2.

FIG. 4 is the internal structure diagram of the first half ring body of the invention.

FIG. 5 is the external structure diagram of the sealing device of the invention.

FIG. 6 is the B-B cross-sectional view of FIG. 5.

FIG. 7 is the structure diagram of the junk ring of the invention.

FIG. 8 is the structure diagram of the annular frame body of the invention.

FIG. 9 is the using structure diagram of the invention.

DETAIL DESCRIPTION OF THE INVENTION

In the following, a detailed description will be made on the specific implementation method of the invention combined with the attached figure.

Just as the connection device of large-diameter compressed air conveying pipe shown in FIG. 1, FIG. 2 and FIG. 3, the device is composed by the metal outer hull and sealing device. The metal outer hull is composed by the first half ring body 1 and the second half ring body 2, and the locking component is set between to connect. The annular lug 19 is respectively set at the two ends of the metal outer hull, and it forms the support opening 14 of the conveying pipe 9. As shown in FIG. 1 and FIG. 2, the locking plate 11 is set at the connection part between the first half ring body 1 and the second half ring body 2, the locking component is bolt 4, and the mounting opening 15 is set at the locking plate 11 of the first half ring body 1. The thread opening 16 is set at the locking plate 11 of the second half ring body. The bolt 4 is set in the mounting opening to connect with the thread opening 16. Meanwhile, the elastic fitting is set at the locking plate 11 between the first half ring body 1 and one side of the second half ring body 2 to connect. The elastic fitting is a rubber strip 5 in the locking plate 11. The boss is respectively set at two ends of the rubber strip 5.

As shown in FIG. 3, the annular mounting slot 12 is set in the lumen of metal outer hull. The first annular slope 13 is respectively set at the two sides of annular mounting slot 12. The first annular slope 13 shows the round towards the two ends. The annular mounting slot 12 is connected with the lumen of the metal outer hull through the first annular slope 13. Two positioning cards 19 are set continuously or internally within the lumen of metal outer hull outside the first annular slope 13, and the limit slot 18 can be formed among two positioning cards 19 for the bulge loop 91 on clamping conveying pipe 9.

As shown in FIG. 5 and FIG. 6, the sealing device is composed by the annular frame body 7, two junk rings 6 and two “O” sealing rings. Two junk rings are set at two sides of the annular frame body 7. As shown in FIG. 8, the annular limit slot 72 is set at the middle of outer annular frame body 7. Many axially limit strips 73 are set at the periphery of the annular limit slot 72. The limit strips 73 can separate many limit notches in the annular limit slot 72. As shown in FIG. 7, three axially extended components 62 shall be respectively set at two junk rings 6 towards the annular limit slot 72. The grab 63 is respectively set at the extended component 62. The extended component 62 at two junk rings 6 is displace set in the limit notch, and the grab 63 is within the limit notch.

As shown in FIG. 6, the normal section of junk ring 6 shows “U” shape, the mounting hole 64 is set at the middle of the junk ring 6, the second annular slope 61 is set at the shoulder part. Two “O” sealing rings 8 are respectively set at the corner of two inner junk rings 6 . The two ends of annular frame body 7 are connected with two “O” sealing rings 8; Moreover, the annular curve or annular slope 65 is set at the corner of the inner ring of junk ring 6. The third annular slope 71 is respectively set at the two inner ends of annular frame body 7.

Before locking the first half ring body 1 and the second half ring body 2, the inner diameter of “O” sealing ring 8 within the sealing device is larger than that of the mounting hole 64 (As shown in FIG. 6), thus the inner end of compressed air conveying pipe 9 can conveniently insert the sealing device. Then make the first half ring body 1 and second half ring body 2 in the sealing device, and lock them with the locking component. The bulge loop 91 in the conveying pipe 9 is set within the limit notch 18. The limit notch 18 is the axially positioning of conveying pipe 9. Furthermore, the stress of the first annular slope 13 on the second annular slope 71 can promote two junk rings 6 to move towards the annular frame body 7. For the effect of annular curve, annular slope 65 or the third annular slope 71, “O” sealing ring 8 bulges inward, thus closely connecting the “O” sealing ring 8 and the extine of the compressed air conveying pipe 9 and realizing the sealing connection and position of the pipe (As shown in FIG. 4). 

1. The connecting device of large-diameter compressed air conveying pipe is equipped with the following features: The device is composed by the metal outer hull and sealing device. The metal outer hull is composed by the first half ring body (1) and the second half ring body (2), and the locking component is set between to connect the first half ring body (1) and the second half ring body (2); The annular mounting slot (12) is set within the metal outer hull with the first annular slope (13) at the both sides. The first annular slope (13) shows the round to the two ends. The annular mounting Slot (12) is connected with the lumen of metal outer hull through the first annular Slope (13); The sealing device is composed by annular frame body (7), two junk rings (6) and two “O” sealing rings (8). Two junk rings are respectively set at the two sides of the annular frame body (7); The normal section of junk ring (6) shows “U”-shape, the mounting hole (64) is set at the middle of junk ring (6), and the second annular slope (61) is respectively set at the shoulder. Two “O” sealing rings (8) are respectively set at the corner of two inner junk rings (6), two ends of annular frame body (7) are respectively connected with two “O” sealing rings (8); Moreover, the annular curve or annular slope (65) is set at the corner of inner junk ring (6), or the third annular slope (71) is respectively set at the two ends of inner annular frame body (7); After locking the first half ring body (1) and the second half ring body (2), the sealing device is set within the annular mounting slot (12) and the first annular slope (13), the second annular slope (61) is connected with the first annular slope (13), the inner diameter of “O” sealing ring (8) is smaller than that of mounting hole (64).
 2. The connecting device of large-diameter compressed air conveying pipe of claim 1, wherein two positioning cards (17) are set continuously or internally within the lumen of metal outer hull outside the first annular slope (13), and the limit slot (18) can be formed among two positioning cards (17) for the bulge loop (91) on clamping conveying pipe (9).
 3. The connecting device of large-diameter compressed air conveying pipe of claim 1, wherein the annular curve or annular slope (65) is set at the corner of inner junk ring (6), and the third annular slope (71) is respectively set at two ends of inner annular frame body (7).
 4. The connecting device of large-diameter compressed air conveying pipe of claim 1, wherein the locking plate (11) is respectively set at the docking part between the first half ring body (1) and the second half ring body (2). The locking component is bolt (4), which is set in the locking plate (11) to lock the first half ring body (1) and the second half ring body (2).
 5. The connecting device of large-diameter compressed air conveying pipe of claim 4, wherein the mounting opening (15) is set at the locking plate (11) of the first half ring body (1), the thread opening (16) is set at the locking plate (11) of the second half ring body (2), and the bolt (4) is set in the mounting opening (15) to connect with the thread opening (16).
 6. The connecting device of large-diameter compressed air conveying pipe of claim 4, wherein the elastic fitting is set at the locking plate (11) at the connection part between the first half ring body (1) and one side of the second half ring body (2) to connect the first half ring body (1) and the second half ring body (2).
 7. The connecting device of large-diameter compressed air conveying pipe of claim 6, wherein the elastic fitting is rubber strip (5) in the locking plate (11). The boss is respectively set at two ends of the rubber strip (5).
 8. The connecting device of large-diameter compressed air conveying pipe of claim 1, wherein the annular limit slot (72) is set at the middle of the outer annular frame body (7), multiple axially extended components are respectively set at the annular limit slot (72) towards two junk rings (6), the grab (63) is respectively set at the extended component (62), and the grab (63) shall be in the annular limit slot (72).
 9. The connecting device of large-diameter compressed air conveying pipe of claim 8, wherein many axially limit strips (73) are set at the periphery of the annular limit slot (72). The limit strips (73) can separate many limit notches in the annular limit slot (72). The extended component (62) in two junk rings (6) is malposition set in the limit notches, and the grab (63) is within the limit notch.
 10. The connecting device of large-diameter compressed air conveying pipe of claim 1, wherein the annular lug (19) is respectively set at the two ends of metal outer hull, and it forms the support opening (14) of conveying pipe (9).
 11. The connecting device of large-diameter compressed air conveying pipe of claim 5, wherein the elastic fitting is set at the locking plate (11) at the connection part between the first half ring body (1) and one side of the second half ring body (2) to connect the first half ring body (1) and the second half ring body (2).
 12. The connecting device of large-diameter compressed air conveying pipe of claim 11, wherein the elastic fitting is rubber strip (5) in the locking plate (11). The boss is respectively set at two ends of the rubber strip (5). 